Flue-wall facing



Aug. 18, 1925.

' W. N. BLACKBURN FLUE WALL FACING Filed May 31. 1924 Patented Aug. 18, 1925.

UNITED STATES WILLIAM N. BLACKBURN, 0F DBEXEL HILL, PENNSYLVANIA.

BLUE-WALL FACING.

Application filed Kay 31, 1924. Serial No. 717,122.

To all whom it may concern:

Be it known that I, WILLIAM N. BLAGK- BURN, a citizen of the United States, residing at Drexel Hill, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in F lue-Wall Facings, of which the following is a specification, reference being had to the accompanying drawings. 1

Flue walls leading from a fireplace are more or less rough and irregular, particularly as regards the sloping or inclined parts of the flue wall which lead to the chimney thereof, and this is true even when the flue walls-are constructed of concrete or material other than brick. As a consequence, the passage of the smoke or products of combustion is more or less retarded.

The purpose of the present invention is to improve upon the construction which is illustrated in my patent on flue wall facings, #1,436,750, granted on November 28, 1922.

One of the objects of the present invention is to provide a flue wall facing or lining plate having laterally projecting lugs, as illustrated in my prior patent, these lugs being so disposed, however, that they are vertical and will, therefore, fit within the vertical joints of the brick work.

Another object is to provide a. construction of this character wherein the lateral flanges or lugs are so formed as to provide shoulders which materially assist in supporting the brick work of the chimney, and

which are also so designed as to su port a base for a flue lining, this base being urthermore so constructed as to lock the lower end of the flue lining in place and prevent any tendency of the flue lining to get out of alignment with the base. 7

ther objects will appear in the course of the following description.

My invention is illustrated in'the accompanying'drawin s, wherein Figure 1 is a ront elevation of a chimney, the front wall of which is broken away to show the flue and the position of my improved facing plates therein;

Flgure 2 is a vertical sectional view on the line 2-2 of Figure 1; I

' Figure 3 is a perspective view of the op pose facing plates;

Figure 4 1s a vertical sectional view on the line 4-4 of Figure 5;

' Figure 5 is a top plan view of the base for the chimney lining;

Figure 6 is aperspective view of one of the bolts used for bolting the upper ends of the facing plates in place;

Figure 7 is a perspective view of a modified form of the flue lining;

Fi ure 8 is a perspective view of the frame which supports the damper;

Figure 9 is a fragmentary sectional view on the line 9-9 of Fi re 3 In the drawings, 1 esignates the chimney generally, 2 the fire place, and 3 the smoke flue which leads upward from the back of the fire lace and which communicates with the vertical and relatively small flue 6 of the chimney. The flue 3 has vertical walls at its lower ortion and upwardly and inwardly extending walls above these vertical walls which are directed toward the chimney throat. There are two ofthese sloping or inclined walls on each side of the chimney.

In order to cover up the irregularities which usually occur in these walls, I provide flue facing plates or linings 7 which are disposed upon the inner faces of the inclined or sloping walls of the flue. These plates may be of cast iron, terra cotta or any other suit: able material. Each facing late is provided with a marginal rem orcement or thickened portion 8, and projectin laterally from the opposite longitudina edges thereof are the lower lugs 9 and the upper lugs 10. The lugs 9 are disposed somewhat above the extreme lower edge of the plate 7 These lugs, as shown in Figure 3, are disposed in a normally vertical position, that is when the plates are disposed within the throat of the chimney these lugs are vertical and, therefore, are parallel to the vertical 'oints between the bricks of the chimney. urthermore, the upper and under faces of these lugs provide shoulders which support the brick work of the chimney. The upper lugs 10 are intended to be disposed practically on a level with the bottom of the chimmy" throat.

From the upper margin of the plate extends the upwardly projecting lugs. These lugs are also vertica and there are preferably apair of these lu the material of the plate being thickene immediately below these lugs 11 and behind the rib or reinforce 8 so as to form shoulder portions 13 which have bolt apertures 14. Through these apertures pass the transversely extehding bolts 15, one ofwhich is illustrated in Figure 6, each of these bolts being screw-threaded at trated in my prior Patent its opposite ends and carrying at each end a pair of nuts 16, between which each plate 7 is adapted to be engaged. It will be noted that the inner face of the plate 7 is perfectly smooth and unbroken and that the inner faces of the lugs 11 are flush with the upper end of this smooth unbroken face of the plate.

Coacting with the lugs 11 and sup orting the lining 17 of the chimney is a ase 18 which is formed of metal, terracotta, or any other suitable material, this base bein angular in cross section so as to provi e an upwardly extending ortion 19 which, as illustrated, is annular inform. The flatbase plate from which this annular portion extends is formed on its margins with recesses 20 so formed as to receive the upwardly extending lugs 11 and interlock therewith, the opposite mar ins of this base 18 resting upon t e upper e ges of the lates. The inner faces of the annular portlon 19 of this base 18 are formed with upwardly extending ribs 21 which project beyond the upper edge of the annular portion 19 so as to overlap the lower ends of the terrawotta flue lining 17 and thereby interlock this flue lining with the base.

In Figure 7, I have illustrated aconstruction wherein the laterally rojecting lugs 9 and 10 are dispensed wit but otherwise than this the construction of the plate 7 is exactly the same as the plate 7. In Figure 8 is illustrated the damper which is used in connection with the fire lace, this damper comprising a frame 22 aving a dam er plate 23 hinged thereto, this damper pate being held in any adjusted position y a rack 24.

It will be seen from Fi re 3 that if the plates'7 are used with a re atively large flue lining or chimney linin 17 that this chimney lining, if it is rectangu ar in form, will rest upon the shoulders formed at the up er ends of the thickened portions 13 but, 0 course, these shoulders act to otherwise support the brick work.

It will be seen that the flue wall lining or facing plates have no flanges on the inner faces thereof and that they do not in any way show and do not in any way extend to the front wall of the fire place. While preferably the bolts 15 will be used, I do not wish to be limited to this.

While in these drawings I have illustrated a flue cap 18, as shown in Figure 4, of terra cotta which is adapted to su port a-circular flue 17 and which coacts wit the plate 7, I do not wish to be limited to this, as a square terra cotta flue or flue of other material rectangular in cross section might be used in place of this circular flue 17, as is illus- #1,436,750, granted November 28, 1922, so that the flue construction is adapted either for use with a circular flue -or with a square flue, as desired. Of course, where a square flue is used, as was shown in my prior patent, it extends outward of the lugs 11 and rests upon the shoulders 13.

It will be seen that this construction ties in the terra cotta flue and acts as a foundation for the same and the angular lugs tie in the front and back walls, enabling a perfect bond to be made and increasing the strength of the construction. The two tie bolts 15 are provided at each end with a suflicient thread for adjustment and each end of the tie bolt is fitted with two nuts for locking the flue throat in osition. One of the important features w ich this flue throat possesses is that it permits the mason to carry back the lower construction-of the front of the fireplace at the roper angle, placing the flue in roper alignment and relation to the firep ace. This is for the reason that, as illustrated in Figure 2, the forward edge of the plate 7 (and the same applies equally well to the plate 7 shown in Figure 7) is upwardly and inwardly inclined, thus permitting the carrying back of the front wall construction to form the throat of the fireplace. These plates 7 and 7 are formed of standard lengths havin a length equal to the height of so many bricks as, for instance, nine bricks, as shown in Figure 1, so that the tenth brick will form a sealing joint with the to of the plate. It is to e particularly note that'the apertures 14 are elongated and thatthe bolts 15 pass through these plates 7 at the upper ends thereof instead of, as shown in my prior patent, passing through the plates 7 below the upper end thereof.

This construction permits the lower ends of the plates 7 to be set further out or nearer together to thereby suit any circumstances of work or irregularities in the framework without changing the area defined between the upper ends of the plates. In my construction, furthermore, the nuts 16 on the bolts 15 fit flat a ainst the outer faces of the portions 13, w ereas in my prior patent the bolts did not fit against the inclined faces of the flue plates but only bore at one edge against these inclined faces. With my construction either a square flue linin or a round flue lining may be used as esired without in any way, in case a round flue lining is used, diminishin the area of the passage through the flue lining and yet at the same time giving full support to the flue lining.

I claim 1. In a flue, a pair of flue wall facing plates disposed in upwardly convergent relation, each plate having upwardly projecting lugs disposed at an obtuse angle to the plane of the facing plate, and a flue supporting base having a horizontal plate 1 ltl Ill recessed to accommodate these lugs, the opposite margins of the base resting upon the upper edges of said plates.

2. In a flue, a air of upwardly convergent flue wall facing plates each having upwardly projecting lugs disposed at an obtuse angle to the plane of the facing plate, and a ue supporting base having a horizontal plate recessed to accommodate these lugs, the opposite margins of the base resting upon the upper edges of said plates, the base having an upwardly projecting wall adapted to abut against the lower edge of the flue lining and havingupwardly projecting ribs upon the inner face of the wall extending beyond the wall and adapted to overlap the flue lining.

3, As an article of manufacture, a flue wall facing plate, the plate being formed with laterally projecting ears disposed adjacent the lower and upper ends of the plate, these ears being disposed at an obtuse angle to the plate whereby when said plate is disposed within the inclined portion of a flue said cars will be disposed in vertical planes.

4. As an article of manufacture, a flue wall facing plate, the plate being formed with laterally projecting ears disposed 'adjacent the lower and upper ends of the plate, these cars being disposed at an obtuse angle to the plate whereby when said plate is disposed within the inclined portion of a flue said ears will be disposed in vertical planes, the upper margin of the plate having a plurality of upwardly projecting lugs disposed in a vertical plane.

5. As an article of manufacture, a flue wall facing plate, the plate being formed with laterally projecting ears disposed adjacent the lowerand upper ends of the plate,

- these cars being disposed at an obtuse angle to the plate whereby when said plate is disposed within the inclined portion of a flue said ears will be dis osed in vertical planes, the. upper margin 0 the platehaving a plurality of upwardly projectlng lugs disposed i! 'a vertical plane, the margin of gular in cross section to provide a flat horizontal portion and an upwardly extending wall, the inner face of the wall being provided with lugs extending beyond the up r edge of the wall to thereby engage the fiiie .liningand lock it in place.

7. As an article of manufacture, a pair 7 of flue wall facing plates having obtusely angled portions at their upper ends, the facing plates being adapted to be disposed at anangle to a vertical plane with .the angled portions in avertical lane, the angled portions being formed witli transversely extending passages at right angles to the angled portions, and bolts passing through said passages.

8. As an article of manufacture, a flue wall facing plate formed with laterally projecting anchoring ears disposed adjacent the lower and upper ends of the plate and with vertically extending ears at the upper end of the plate, one edge of the plate extending upward and inward relative to the opposite edge of the plate.

9. In a chimney having an upwardly directed flue opening and a vertically extend ing throat disposed at the upper end of the flue opening, oppositely disposed facing plates disposed against the opposite inclined faces of the flue, and bolts connecting the upper ends of said facing plates, the facing plates having vertically elongated openings through which said bolts pass permitting the plates to be swung relative to the bolts.

In testimony whereof I hereunto affix my signature.

WILLIAM N, BLACKBURN. 

